84771451 has 2 divisors, whose sum is σ = 84771452. Its totient is φ = 84771450.

The previous prime is 84771439. The next prime is 84771457. The reversal of 84771451 is 15417748.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84771451 - 2¹¹ = 84769403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84771451.

It is not a weakly prime, because it can be changed into another prime (84771457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42385725 + 42385726.

It is an arithmetic number, because the mean of its divisors is an integer number (42385726).

Almost surely, 2^84771451 is an apocalyptic number.

84771451 is a deficient number, since it is larger than the sum of its proper divisors (1).

84771451 is an equidigital number, since it uses as much as digits as its factorization.

84771451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 37.

The square root of 84771451 is about 9207.1413044441. The cubic root of 84771451 is about 439.2885385779.

The spelling of 84771451 in words is "eighty-four million, seven hundred seventy-one thousand, four hundred fifty-one".